Shoulder bursitis occurs when one of the shoulder’s cushioning sacs, called bursae, becomes inflamed. This small fluid-filled structure helps reduce friction between the bones, tendons, and muscles of the shoulder. When irritated, it can cause pain, stiffness, and restricted motion that make simple movements—like lifting an arm or reaching overhead—feel uncomfortable.

The condition is often linked to repetitive shoulder activity, strain, or gradual wear from posture and joint mechanics. It can also occur after a fall or develop alongside other shoulder issues, such as tendon inflammation. While most cases are not severe, recognizing bursitis early can help prevent long-term irritation and reduced function.

By understanding how shoulder bursitis forms, what factors contribute to inflammation, and when to seek professional evaluation, you can take informed steps to protect your shoulder health and movement.

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